DOI 10.35776/VST.2022.10.05
UDC 628.35

Stepanov S. V., Avdeenkov Pavel, Ponomarenko Ol’ga, MOROZOVA K. M.

Determination of kinetic constants and coefficients of biological processes of wastewater treatment of egg advanced processing enterprises

Summary

The results of studies carried out in contact conditions with active sludge of a laboratory batch reactor with wastewater from an enterprise for advanced processing of chicken eggs are presented. In the course of kinetic experiments based on measuring the rate of dissolved oxygen consumption the following averaged values of the kinetic constants of the biological treatment processes were established for wastewater after preliminary coagulation: the maximum rate of oxygen consumption at a sludge concentration a_i → 0 ρ`<sub>max</sub> = 44.8 mg/(g·h) in terms of a temperature of 20°С; Michaelis constant K<sub>m</sub> = 77.5 mg/l; coefficient of inhibition by metabolic products φ=0.265; temperature constant χ = 0.08°С<sup>–1</sup>; optimal pH value 7.8 and pH constant 80. During the experiments with raw wastewater, the following average values of the constants were determined: the maximum rate of oxygen consumption at 20°С and a<sub>i</sub> → 0 ρ`_max = 26.5 mg/(g·h); Michaelis constant Km = 50.6 mg/l; coefficient of inhibition by metabolic products φ=0.065; temperature constant χ = 0.1°С^–1; pH_opt 7.8 and Kр_Н = 170. The obtained values of kinetic constants and coefficients can be used in the calculation of biological wastewater treatment facilities of an egg processing enterprise.

Key words

wastewater , biological treatment , kinetic constants , food industry , egg processing enterprise , batch reactor

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REFERENCES

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